Culex Dupreei, new species,— Female. Near serratus, but much smaller, the white-scaled median vitta of the mesonotum broader, widening posteriorly where it is wider than the brown lateral portion, etc. Black, the bases of antennæ, lower part of pleura, the metantotum, basal portion of venter, coxæ, and femora yellowish; scales of palpi black, those of occiput white, and with a spot to black ones each side; scales of middle of mesonotum white, those on the sides brown, on the pleura and scutellum white; scales of abdomen brown, those in the basal angels of the segments and on the venter white; scales of femora yellowish, those on front side of first two pairs, and on apical portion of upper side of hind ones, chiefly brown, those of tibiæ and tarsi brown; tarsal claws toothed; wings hyaline, lateral scales of the veins narrow and liner, petiole of first submarginal cell about one-third the length of that cell, hind crossvein about its length from the small; length, slightly over 2 mm.